1616635681: OFS Q-21 AIR END

We supply the genuine Atlas Copco 1616635681 OFS Q-21 Air End. As an distributor of Atlas Copco products, we source this critical component directly from Atlas Copco (Shanghai) Trading Co., Ltd. , guaranteeing 100% new original quality.

Product Introduction

The OFS Q-21 Air End serves as the heart of your oil-free screw compressor system . This precision-engineered component delivers 100% oil-free compressed air for applications where air purity is absolutely critical. Industries such as food and beverage, pharmaceuticals, electronics manufacturing, and healthcare facilities rely on this air end to maintain product integrity and regulatory compliance .

Atlas Copco applies strict quality control throughout manufacturing and final inspection. Each OFS Q-21 AIR END undergoes dimensional checks and functional validation before release . The advanced coating technology on the rotors ensures minimal internal leakage and maximum efficiency throughout the service life .

Product Specifications

The table below lists the complete technical details for this air end.

Specification	Value
Part Name	OFS Q-21
Part Number	1616635681
Type	Oil-Free Screw Air End
Compatibility	Atlas Copco Oil-Free Rotary Screw Compressors
Origin	Belgium (BE)
Tariff Code	84149090
Weight	904 kg
Width	860 mm
Height	850 mm
Length	1260 mm
Warranty	12 months on design and production defects

Product Benefits

100% Oil-Free Air Quality: The OFS Q-21 design eliminates any risk of oil contamination in your compressed air system. This protects sensitive production processes and final products in critical applications .

Energy Efficiency: Atlas Copco engineers designed this air end with advanced rotor profiles and Teflon-based coating technology. The coating tightens the seal between rotors and housing while reducing friction, delivering up to 20% lower energy consumption compared to refurbished alternatives .

Extended Service Life: Precision machining holds tolerances to a fraction of the diameter of a human hair . This attention to detail, combined with high-quality bearings and seals, ensures thousands of hours of reliable operation.

Genuine Performance Guarantee: Each unit undergoes dimensional checks and functional validation before leaving the factory. You receive 100% genuine Atlas Copco quality with full traceability from Belgium.

12-Month Warranty Protection: We supply this product with Atlas Copco’s 12-month warranty on design and production defects, giving buyers confidence in both performance and after-sales support.

Instructions & Precautions

Precautions

WARNING: Before carrying out any maintenance, repair work, or adjustments, follow these safety steps :

1. Stop the compressor completely and switch off the main isolator
2. Open the isolating switch and lock it in the OFF position
3. Close the air outlet valve and open the manual condensate drain valve
4. Depressurize the system completely. Verify pressure gauges read zero
5. Allow the compressor to cool to ambient temperature before handling
6. Do not attempt to refurbish or rebearing a worn air end. Atlas Copco advises against refurbishment due to the extreme precision required—improper reassembly causes extensive air leaks and performance loss of up to 20%
7. Use only genuine Atlas Copco parts. Any damage caused by unauthorized parts voids the warranty
8. When servicing, replace all removed gaskets, O-rings, and washers with new ones
9. Dispose of used components in an environmentally friendly manner according to local regulations

Step-by-Step Replacement Procedure

1. System Preparation

• Perform a full system shutdown following the lockout/tagout procedure
• Place a clear “DO NOT OPERATE” tag on the compressor control panel
• Allow the compressor to cool for a minimum of 2 hours after shutdown

2. Remove the Old Air End

• Disconnect all air and oil lines (note: oil-free compressors still have gearbox lubrication)
• Remove the coupling guard and disconnect the drive coupling
• Support the air end with appropriate lifting equipment (weight: 904 kg)
• Remove mounting bolts and carefully extract the old air end from the compressor frame

3. Prepare the New Air End

• Inspect the new OFS Q-21 for any shipping damage
• Verify all ports are sealed and free from debris
• Check that the rotor turns freely by hand

4. Install the New Air End

• Position the new air end using appropriate lifting equipment
• Align the drive coupling precisely—misalignment causes premature bearing failure
• Torque all mounting bolts to manufacturer specifications
• Reconnect all air and oil lines with new gaskets and seals

5. Post-Installation Checks

• Perform a dry run without load to verify smooth operation
• Check for unusual noise or vibration
• Verify operating temperatures and pressures against manufacturer specifications
• Run through a full load cycle while monitoring performance parameters

6. Warranty Registration

• Record the installation date and serial number
• Retain all original packaging and documentation for warranty purposes

Frequently Asked Questions

Q1: Which compressor models is the OFS Q-21 air end compatible with?
A: The OFS Q-21 is designed for Atlas Copco oil-free rotary screw compressors. Contact our technical team with your compressor model and serial number for specific compatibility confirmation.

Q2: Why should I buy a new genuine air end instead of getting my old one refurbished?
A: Atlas Copco advises against refurbishment. The precision tolerances on oil-free air ends are extremely tight—refurbished units often leak and consume up to 20% more energy than new genuine units. The initial savings disappear within approximately 13 months due to higher energy bills .

Q3: How do I verify this OFS Q-21 is genuine from ACD?
A: We source this product strictly from Atlas Copco (Shanghai) Trading Co., Ltd. It arrives in factory-sealed Atlas Copco packaging with full traceability labels, batch numbers, and authenticity seals. You receive 100% genuine new stock.

Q4: What does the 12-month warranty cover?
A: The warranty covers design and production defects. It does not cover misuse, improper fitting, normal wear and tear, or damage caused by using non-genuine spare parts. Keep your purchase documentation for any warranty claims.

Q5: Does ACD provide technical support for installation?
A: Yes. We provide remote technical support and detailed installation guidance. For complex installations, we can recommend certified Atlas Copco service technicians in your region.

More Air Ends List

If you need other Atlas Copco air compressor air ends, we provide more models in the table below or you can submit your requirements to us directly.

Part Number	Name	Order Number
2934998836	ELEMENT  O.I.S.	2934-9988-36
1616578982	O.I.S. H-03 5	1616-5789-82
1616714693	SERVICE STAGE O.I.S. C146	1616-7146-93
1616715200	COVER-ELEM.O.I.S C146	1616-7152-00
1616728190	O.I.S. K-36	1616-7281-90
1616655190	SERV. ELEM. O.I.S. M	1616-6551-90
1632002980	ELEMENT COMPR Z4 O.F.S.	1632-0029-80
1616550181	O.F.T. K-01	1616-5501-81
1616580381	O.F.S. K-21	1616-5803-81
1616580383	O.F.S. K-23	1616-5803-83
1616728180	O.I.S. K-36	1616-7281-80
1616728190	O.I.S. K-36	1616-7281-90
1616585181	O.F.S. G-21	1616-5851-81
1616585182	O.F.S. G-22	1616-5851-82
1616585183	O.F.S. G-23	1616-5851-83
1616590463	O.F.S. M-26	1616-5904-63
1616590481	O.F.S. M-21	1616-5904-81
1616590482	O.F.S. M-22	1616-5904-82
1616590483	O.F.S. M-23	1616-5904-83
1616630581	O.F.S. O-21	1616-6305-81
1616630582	O.F.S. O-22	1616-6305-82
1616635681	O.F.S. Q-21	1616-6356-81
1616652781	O.F.T. I-01	1616-6527-81
1616677082	O.F.S. E-22	1616-6770-82
1616716187	O.F.S. O-27	1616-7161-87
1616716287	O.F.S. Q-27	1616-7162-87
1616747281	O.F.S. I-41	1616-7472-81
1616747282	O.F.S. I-42	1616-7472-82
1616747287	O.F.S. I-47	1616-7472-87
1616855161	O.F.S. K-25	1616-8551-61
1616679288	O.F.S. I-48	1616-6792-88
1616734582	ELEMENT COMPR.	1616734592
1616869390	OIS M-10	1616869390
1616736091	OFSB-M1 SERVICE	1616736091
1616635683	STAGE 6 GAS	1616635683
1616706682	O.I.S. Q-02	1616706692
1616754080	OIS Q-05	1616754090
1616714683	C146 OIS M-05	1616714683
1616714693	SERVICE STAGE O.I.S. C146	1616714693
1616833682	AIREND OFSL D-02/3,7KW-10BAR	1616833682
1616724890	SERVICE STAGE AIREND C106 OMCO	1616724890
1616710390	SERVSTAGE GX2-5C OIS D-11(C40	1616710390
1616626090	SERVICE STAGE O.I.S. H-05	1616626090
1616727181	OFT G-21 Withdrawn	1616727181
1616727381	ELEMENT HP T2	1616727381
1616533251	COMPR.ELEMENT	1616533251
1616725791	OIS-N-02 SERVICE ELEMENT	1616725791
1616740881	BELT DRIVEN C111	1616740881
1616725781	O.I.S. N-02	1616725781
1616774580	OIS ELEMENT C67 H-10	1616774580
1616774590	SERVICE AIREND C67 H10	1616774590
1616677081	ELEMENT COMPR	1616677081
1616714682	ELEM COMP C146 M07	1616714682
1616719480	ELEMENT COMPR. OIS K-38	1616719480
1616998490	ELEMENT	1616998490
1616725681	O.I.S. O-01	1616725681
1616753580	ELEMENT OIS F-09 (C55*)	1616753580
1616753590	SERVICE ELEMENT OIS F-09(C55*)	1616753590
1616753582	ELEMENT OIS F-09 (C55*)	1616753582
1616753592	SERVICE ELEMENT C55 F09	1616753592
1616657593	OIS F-05(C55)	1616657593
1616965694	SERVICE AIR-END OIS F-14	1616965694
1616761280	O.I.S. J-34	1616761290
1810028280	O.I.S. J-35	1810028280
1616718787	OFS M-27	1616718787
1616757790	OIS J-51 C90-BELT SPARES	1616757790
1616671280	OIS H-06	1616671290
1616710781	OFT E-11	1616710781
1616747288	OFS I-48	1616747288
1616738280	ELEMENT C80 I-01	1616738290
1616714681	M-06	1616714691
1616646680	OIS-K25	1616646680
1616578982	O.I.S. H-03 5	1616578982
1616578992	Belt Drive C77	1616578992
2236050100	AIR END ATSL-165E 3.7KW 8BAR	2236050100
2236050200	AIR END ATSL-165E 3.7KW 10BAR	2236050200
1616765180	OIS C80 I-03	1616765190
1616679281	0.FS. I-41	1616679291
1616903480	OIS D-20 ELEMENT C43	1616903490

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